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Btrfs: fix EIO from btrfs send in is_extent_unchanged for punched holes 

When you take a snapshot, punch a hole where there has been data, then take
another snapshot and try to send an incremental stream, btrfs send would
give you EIO. That is because is_extent_unchanged had no support for holes
being punched. With this patch, instead of returning EIO we just return
0 (== the extent is not unchanged) and we're good.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Cc: Alexander Block <ablock84@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
This commit is contained in:
Jan Schmidt 2013-03-21 14:30:23 +00:00 committed by Josef Bacik
parent 4adaa61102
commit adaa4b8e4d
1 changed files with 4 additions and 6 deletions
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10
fs/btrfs/send.c
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@ -3945,12 +3945,10 @@ static int is_extent_unchanged(struct send_ctx *sctx,
found_key.type != key.type) {
key.offset += right_len;
break;
} else {
if (found_key.offset != key.offset + right_len) {
/* Should really not happen */
ret = -EIO;
goto out;
}
}
if (found_key.offset != key.offset + right_len) {
ret = 0;
goto out;
}
key = found_key;
}